High Pressure Cyrogenic Process and System for Producing Ammonia Products
AssigneeKellogg Brown & Root LLC
InventorsAvinash Malhotra, James H. Gosnell, Yue Jing
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Abstract
Systems and methods for producing ammonia and/or ammonia products. The ammonia and/or ammonia products can be produced by compressing a gas mixture comprising nitrogen, hydrogen, methane, and argon to produce a compressed gas mixture having a pressure of from about 1,000 kPa (130 psig) to about 10,400 kPa (1,495 psig). All or a portion of the compressed gas mixture can be selectively separated at cryogenic conditions to produce a first gas comprising nitrogen and hydrogen, and a second gas comprising methane, argon, residual hydrogen and nitrogen. At least a portion of the first gas can be reacted at conditions sufficient to produce an ammonia product.
Claims20
A method for producing ammonia, comprising:
- compressing a gas mixture comprising nitrogen, hydrogen, methane, and argon to produce a compressed gas mixture having a pressure of from about 1,000 kPa (130 psig) to about 10,400 kPa (1,495 psig);
- selectively separating all or a portion of the compressed gas mixture at cryogenic conditions to produce a first gas comprising nitrogen and hydrogen, and a second gas comprising methane, argon, residual hydrogen and nitrogen;
- and
- reacting at least a portion of the first gas at conditions sufficient to produce an ammonia product.
A method for producing ammonia, comprising:
- compressing a gas mixture comprising nitrogen, hydrogen, carbon monoxide, and carbon dioxide, and having a hydrogen-to-nitrogen molar ratio of less than about 2.2:1, to produce a compressed gas mixture having a pressure of from about 1,000 kPa (130 psig) to about 10,400 kPa (1,495 psig);
- selectively separating all or a portion of the compressed gas mixture to produce a first gas comprising nitrogen and hydrogen, having a hydrogen-to-nitrogen molar ratio of from about 2.2:1 to about 3.2:1, and a second gas comprising carbon monoxide, and carbon dioxide, and wherein the selective separation occurs at a temperature of from about −200° C. (−325° F.) to about 0° C. (30° F.);
- and
- reacting at least a portion of the first gas at conditions sufficient to produce an ammonia product.
A system for producing ammonia comprising:
- a reformation zone wherein one or more hydrocarbons are converted in the presence of one or more oxidants and steam, to produce a first mixture comprising carbon dioxide, carbon monoxide, hydrogen, nitrogen, argon, water, and methane;
- a conversion zone wherein the first mixture is converted in the presence of water, forming a second mixture comprising hydrogen, nitrogen, oxygen, argon, carbon dioxide and residual carbon monoxide;
- a first separation zone wherein at least a portion of the carbon dioxide is selectively separated from the second mixture, providing a gas mixture comprising hydrogen, nitrogen, argon, residual carbon dioxide and carbon monoxide, mixtures thereof, or combinations thereof;
- a methanation zone wherein at least a portion of the residual carbon dioxide and carbon monoxide in the second mixture is converted to methane and removed to produce a gas mixture comprising hydrogen, nitrogen, argon, water, and methane;
- a compression zone wherein the gas mixture is compressed, providing a compressed gas mixture;
- a second separation zone wherein the compressed gas mixture is selectively separated under cryogenic conditions to produce a first gas comprising hydrogen and nitrogen and having a hydrogen-to-nitrogen molar ratio of from about 2.2:1 to about 3.2:1, and a second gas comprising nitrogen, carbon monoxide, carbon dioxide and argon;
- and
- a reaction zone wherein at least a portion of the first gas is reacted at conditions sufficient to produce one or more ammonia products.
Dependencies are inferred from the claim text.